"A beautiful river maiden who lives at the rock of the same name on the Rhine River. She lures sailors to their doom with her enchanting voice. Made famous in Heine's poem. In ancient times, she was seen as one and the same as the river goddess, but the menacing rock and heavy currents turned her into a witch."
A demon participating in the Challenge Quest, RxW Smacktacular XIII. Part of Team Red, she is found in Shinjuku Kabuki-cho. Called the beautiful songstress of the Expanse who sings mysterious and magical melodies, she asks Flynn to hear her song of tragic love. The other Hunters of Team White are freed from their trance after her song ends.
"A beautiful river maiden who lives on the eponymous rock on the Rhine. She lures sailors to their doom with her enchanting voice. Immortalized in Heine's poem. In ancient times, she was seen as the same as the river goddess, but the menacing rocks and the heavy currents of the Rhine turned her into a witch that drags people below the waters. There are many legends concerning Lorelei. In some, she is a goddess, in others, she is a water witch, and there is even a story where she is a figure of tragic love."
Airi Ban summons Lorelei after one of the Megrez buds crushes a concert hall that held her past memories. After Lorelei strums her harp once, huge spikes of ice (possibly showing an animated version of Ice Dance or Bufudyne) instantly impales the Septentrion, causing Megrez to "bleed" and leaving its core vulnerable.
Lorelei is later summoned in battle against Benetnasch. It joined in with other demons to attack the vulnerable full body, using its ice attacks once again to impale the Septentrion for a short time. However, thanks to Benetnasch's demon-revoking properties, Lorelei was forced back into its cell-phone among with the other demons, leaving Airi helpless. Later she is seen again in Hibiki's demon app by fusing her with Black Frost into Purple Mirror.